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Tag: "itself" at biology news

The Antarctic Ocean floor

...measure between 1mm and 150mm. In the laboratory itself photographs are again taken in order to identify features peculiar tot he animal and, finally, the classification of the species in question is presented in the specialist literature. In the previous campaign, expedition members discovered a new spe...

Life in deadly conditions

...able to predict that Natronomonas pharaonis can by itself produce vitamins and amino acids. Thus, the growth medium for the culture of the single-celled organism could be significantly simplified. Dieter Oesterhelt explains that "the comparison with other halophile archaea we have studied shows that these ...

New genetic test can detect clam disease

... clam by secreting a thick mucus layer to insulate itself from the clam's immune system. Rebecca Gast, an associate scientist in the Biology Department at Woods Hole Oceanographic Institution (WHOI), has developed a genetic test to detect the organism not only in clams but in seawater and sediment. Since Q...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...re, extending eight to 16 kilometres in height) is itself a harmful toxic pollutant, a major ingredient of photochemical smog. "While nitrogen dioxide vertical column concentrations above central and eastern Europe and parts of the East Coast of the United States have been either static or exhibiting a sm...

Researchers offer proof-of-concept for Altered Nuclear Transfer

...is gene in the donor nucleus and then incorporated itself into all the cells comprising the blastocyst. As a result, all of the resulting mouse blastocysts were incapable of implantation. However, once the stem cells had been extracted from the blastocysts, Cdx2 was still disabled in each of these new c...

Prostate cancer uses Wnt signaling proteins to promote growth of bone tumors

...eins called Wnts (pronounced "wints") to establish itself in bone. By changing the amount and activity of Wn...n also prevented prostate cancer from establishing itself in bone. By learning how DKK-1 blocks Wnt's signal to prostate cancer cells, they hope to learn how ...

Bacteria which sense the Earth's magnetic field

...But microscopy made it apparent that MamJ arranges itself along a filamentous structure which trails like a string through the entire cell. In looking for this structure, the researchers used a new electron microscopic method which was developed in the Department of Molecular Structural Biology at the Max P...

Anti-cancer drugs may hold promise for premature aging disorder

...s grown in the laboratory, progerin did not anchor itself to the inner nuclear membrane and instead clumped within the nucleus. Moreover, they observed no nuclear blebbing. The researchers then tried treating the cells carrying progerin with FTIs, which are drugs originally developed to inhibit certain can...

Dangerous tricksters: Some bacterie use immune cells to reproduce

...his 'phagosome' (from Greek phagein = to eat) cuts itself off into the inside of the macrophage and is now the point on which all the macrophage's offensive weaponry is concentrated: the phagosome is flooded with oxygen radicals and acid. Another kind of membrane bags, the lysosomes, merge with the phagosom...

Bacterial protein mimics host to cripple defenses

...onditions, shedding light on immunity. The protein itself or a derivative might one day be applied to control disease in crops or in people. For now, Martin and Abramovitch are working to find which proteins AvrPtoB acts on, and what role those proteins play in host PCD. ...

Max Planck researchers make a breakthrough in plant stem cell research

... in regulation of the stem cell pool. The hormone itself instigates the meristematic stem cells to split; at the same time, it activates various ARR genes, which break the cytokinin signal chain. Jan Lohmann explains that "WUSCHEL supports the cytokinin effect by stopping its negative feedback." That is al...

Clinical trial to test stem cell approach for children with brain injury

...muscle and other organs, the brain does not repair itself effectively. Traumatic brain injury victims can regain some function through rehabilitation. Studies show between 15 and 25 percent of children suffering severe traumatic brain injury die, and survivors of even moderate injury often are devastated ...

Key brain regulatory gene shows evolution in humans

...at the DNA segment that coded for the PDYN protein itself -- as well as other sites spread around the genome -- showed evidence of "negative selection" that would preserve their original structure. A key experiment, said Wray, was a laboratory demonstration that such regulatory mutations did have functiona...

Limiting the damage in stroke

...e," Pasparakis says. "You can't do that with NF-kB itself ?in other types of cells the signal has important functions which are necessary for the animal to survive. So to test our hypotheses about its role in neurons, we needed more precise control of the gene." In parallel, Bernd Baumann and Thomas Wirth a...

Discovering the first steps in transcription-coupled repair

...e obstruction and repairs the damage. But when TCR itself fails, the results can be lethal to cells and to t...n this site is inside the RNAPII, which has closed itself around the two strands of DNA with a "clamp module." Indeed, the researchers found that RNAPII boun...

Brainstem blocks pain to protect key behaviors

..." the authors note, "allowing an animal to nourish itself without being distracted." (Animals that don't urinate are at high-risk for infections.) As a final test the authors used drugs to inactivate the VMM. This completely eliminated the delayed response to pain. "This is the best evidence so far on th...

Cancer support cells may evolve, fuel tumor growth, study shows

...n selective pressures, not only on the cancer cell itself but also on the surrounding cell, she said. "Think of it as a microcosm of evolution, such that every change that goes on in the cancer cell can impact cells around it. It's a back-and-forth cross-talk via which the whole entity evolves, not just a ...

How E. coli bacterium generates simplicity from complexity

...lly enables it to generate a nice steady state for itself regardless of what it has to live on." Higher organisms have larger genomes and much more complexity, but Palsson noted that several theoretical studies predict that even eukaryotic cells will exhibit a relatively small number of functional states. ...

What can change in the brain? Electrical synapses, research shows

The brain's ability to reorganize itself - strengthening or weakening connections between neurons or adding or subtracting those connections - allows it to form memories, make transitions between sleep and waking, and focus attention on objects of interest. This phenomenon is a form of neu...

Bacteria that cause tooth decay able to survive without important biochemical pathway

...this case, a bacterium - becomes unable to protect itself from harsh environmental conditions. In the human mouth, its natural environment, it is typically S. mutans that goes on the attack. When sugary foods are eaten, the S. mutans population explodes, excreting lactic acid as it digests sugar. The acid...

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